Correct Answer - Option 3 : 0.6
Given:
Length of the rod = 72 cm
One part is (1/5)th of the other.
Calculation:
Total length of rod = 72cm
Let First part be x
Second part = (1/5)x
⇒ x + x/5 = 72
⇒ 6x/5 = 72
⇒ x = 60
Now, the first part = 60 cm
The second part = 72 - 60 = 12 cm
∴ The longest part is 60 cm.
1 metre = 100 cm
∴ The longest part is 0.6 m.